Vacuum cleaner



FIG. 1 is a front perspective view of a vacuum cleaner showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof.

Elements shown in broken lines form no part of the claimed design. 

CLAIM We claim the ornamental design for a vacuum cleaner, as shown and described. 